/**
 *
 0x55c0a2127008 4
(nil) -94285841199108
 *
 */
#include<stdio.h>
#include<string.h>
int main(){
	char *s = "how are you";
	char *r = NULL;
	 r = strchr(s,'a');
	 printf("%p %ld\n", r, r-s);

	 r = strchr(s,'z');
	 printf("%p %ld\n", r, r-s);
	 return 0;
}
